This document presents PersoNet, a friend recommendation system for social networks based on the big-five personality traits model and hybrid filtering. Most existing friend recommendation systems rely on homophily, which recommends friends similar to the user. However, personality is not necessarily compatible with those who have the same traits. PersoNet addresses this by recommending friends based on personality traits and user harmony ratings. An evaluation shows PersoNet has better precision and recall than collaborative filtering-based systems.